For starters, “Hud” stands for “Heads Up Display”. It means that your instrument information is displayed on the inside of the cockpit front window so you don’t have to look down at the panel for the basics.
For the scope, as you look threw the EOtech, any off viewing angle will still keep the dot on the target , which allows you to move your head around on the stock without changing the Point of aim.

I once thought that I had all the answers, but after consorting with the "Magic 8 Ball", I have found it to be "Doubtable Not So".

Originally Posted By Dano523:
For starters, “Hud” stands for “Heads Up Display”. It means that your instrument information is displayed on the inside of the cockpit front window so you don’t have to look down at the panel for the basics.

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How does this relate to the EOtech Sights?

For the scope, as you look threw the EOtech, any off viewing angle will still keep the dot on the target , which allows you to move your head around on the stock without changing the Point of aim.

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I don't know much about red-dot sights, but I thought all Red Dot scopes could do that...
Thank you

Most of the red dot uses a reflective technology, they use a electo-diode to refelct a red dot on to the glass. EOTech uses a l=aser projection, so the manufacture can create any reticle without loosing parallex unlike the reflective technology, they can only create a single red dot to maintain parallex free.
EOTech used to own by ERIM, ERIM use to and still manufacture HUD gun sight for various military applications.

HUD = dud = Dept of Housing and Urban Developement - a POS Gov. project that sells junk property that banks have forclosed on when the banks start getting shaky themselves.
Yes I bought this ready to be condemed POS house from HUD for $500 down!

Originally Posted By ProfGAB101:
HUD = dud = Dept of Housing and Urban Developement - a POS Gov. project that sells junk property that banks have forclosed on when the banks start getting shaky themselves.
Yes I bought this ready to be condemed POS house from HUD for $500 down!